Theism

Theism is the religiousbelief that at least one god exists. Polytheism is the belief in several gods, while monotheism is the belief in just one god. For example, a theistic religion is Christianity. The opposite to a theist is an atheist. An atheist is a person that does not believe in any god or gods.

gnosticism — believing that we can know for certain whether a god(s) exist.

Gnosticism and agnosticism can be combined with other forms of theism. For example, it is possible to be an agnostic atheist, or a gnostic theist. In common usage, some people group atheism and agnosticism together under the group of nontheism — absence of clear belief in any deity.

The main types of theism are:

polytheism — believing that many gods or goddesses exist (sometimes known as paganism)